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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Textile Science and Engineering
Journal Basic Information
Journal DOI :
The Korean Fiber Society
Editor in Chief :
Volume & Issues
Volume 47, Issue 6 - Dec 2010
Volume 47, Issue 5 - Oct 2010
Volume 47, Issue 4 - Aug 2010
Volume 47, Issue 3 - Jun 2010
Volume 47, Issue 2 - Apr 2010
Volume 47, Issue 1 - Feb 2010
Selecting the target year
Properties of PVDF and PMMA Blends Films Prepared by Thermal Casting
Lee, Jung-Gyu ; Kim, Seong-Hun ; Kang, Ho-Chun ; Park, Sang-Ho ;
Textile Science and Engineering, volume 47, issue 5, 2010, Pages 307~313
Polyvinylidene fluoride (PVDF)/Polymethylmethacrylate (PMMA) blended films were optimized by changing the PMMA concentration in PVDF/PMMA blends for use as protective sheets for photo-voltage cells and modules. Films of poly(vinylidene fluoride) (PVDF) and poly(methyl methacrylate) (PMMA) blends were prepared by thermal extrude casting. The rheological properties, chemical structure, crystalline behavior, thermal, morphology, optical properties and contact angle of the PVDF/PMMA blend films were examined by RDS, FTIR, XRD, DSC, TGA, SEM and color spectrometry. The PVDF/PMMA blend containing 30 wt.% PMMA showed good performance for potential applications as the protective sheet in photo-voltage cells and modules. The
crystalline phases in the films decreased and increased, respectively, with increasing PMMA content. The shear viscosities increased with increasing PMMA content. The melt temperature (
) and crystalline temperature (
) of the blends decreased with increasing PMMA content.
Experimental Verification of the Fiber Bundle Drawing Dynamics
Kim, Jong-Seong ; Huh, You ;
Textile Science and Engineering, volume 47, issue 5, 2010, Pages 314~321
Short staple fibers are processed in forms of bundle, and the thickness variation of the fiber bundles plays an important role in determining the bundle quality. Since the staples in a bundle generally have a length distribution, the processed bundle thickness is affected by the fiber length distribution, which is strongly dependent on the flow dynamics during the drawing process of bundles. This study examined the effectiveness of a dynamic model for describing the roller drawing process, while considering the power form of the beard diagram for the fiber length distribution of the bundle. Two factors, the drawing ratio and fiber length distribution, were considered, and the draft ratio was set in two levels: a low drawing ratio level and a high drawing ratio level. Slivers with different beard diagrams were treated under the roller drawing operation and the output sliver thickness was measured. In addition, the output thickness was simulated based on the theoretical model. The simulation results were compared with the experimental results. The theoretical model describing the bundle flow matched the real roller drawing operation quite well, which was confirmed by the agreement of the simulation and experiments results. A low drawing ratio of the output bundle is advantageous from a quality point of view. In addition, the bundle with a fiber length distribution resulted in better linear density regularity of the output bundle than the bundle with a uniform fiber length. However, the irregularity difference due to the fiber length distribution disappeared at drawing ratios above a critical value, between 20 and 30.
New Approach Using Centrifugal Force for the Manufacture of Fine Denier Fibers
Shim, Hyun-Joo ;
Textile Science and Engineering, volume 47, issue 5, 2010, Pages 322~325
There are several ways for producing fine denier fibers, such as conjugate spinning, melt blowing, electro-spinning, etc.. Each of these methods has its own merits and demerits. A new technology for manufacturing micro fibers was devised. The idea of this equipment was to apply a centrifugal force on the molten polymer to elongate the spun fiber. The angular velocity of the spinneret, nozzle hole diameter, and melting temperature were controlled to determine their effects on the fiber diameter. The results showed that <0.1 denier fibers could be produced swiftly and economically. The simple machine design enables the operator to access the machine with little or no experience in fiber spinning, and leads to an almost maintenance-free machine compared to other spinning apparatuses.
Development of Fiber Orientation Distribution in 3-dimentional Nonwovens by Using Compressed Air
No, Hyun-Woo ; Yun, Min-Ju ; Cho, Ki-Soon ; Kim, Han-Seong ;
Textile Science and Engineering, volume 47, issue 5, 2010, Pages 326~332
3-dimensional nonwoven fabrics show high loft performance owing to their dominant fiber orientation in the thickness direction. A high loft performance is a fundamental requirement for applications to cushion materials and pre-filters etc. In this study, the process was optimized to obtain 3-dimensional nonwoven fabrics with improved physical properties. The process conditions, such as the distance between the air ejection nozzles, compressed air pressure and web sustaining mesh size, were examined to develop a fiber orientation in the thickness direction of nonwoven fabrics. The mechanical properties and fiber orientation distribution function (ODF) were compared.
Non-porous Breathable Waterproof Coating of PET Fabrics Using UV-curable Polyurethane Diacrylate
Koo, Gwang-Hoe ; Jang, Jin-Ho ;
Textile Science and Engineering, volume 47, issue 5, 2010, Pages 333~338
Non-porous breathable waterproof PET fabrics were prepared by a UV coating of UV-curable polyurethane diacrylate (PUA) formulations. The performance of the monolithically coated fabrics was affected by the type of UV lamp, UV energy, photoinitiator type and its concentration. The optimal UV coating was achieved when the PUA formulation containing 10 w% benzophenone was cured with a UV energy of
using a H-bulb. The moisture permeability of the UV-coated fabrics increased with increasing photoinitiator concentration with a marginal decrease in hydrostatic pressure. The addition of silicone diacrylate to the formulation was found to be beneficial in increasing the hydrostatic pressure. The UV-based PUA coating can be an alternative to the conventional thermal curing of solvent-borne polyurethane coatings due to the enhanced environment friendliness and energy saving.
Fabrication and Characterization of Poly(vinyliden fluoride) Nanofibers
Lee, Myung-Sun ; Park, Won-Ho ;
Textile Science and Engineering, volume 47, issue 5, 2010, Pages 339~344
A poly(vinylidene fluoride) film and nanofiber were fabricated from a mixed solvent of N,N-dimethylformamide and non-polar acetone. With increasing acetone content in the mixed solvent, the viscosity of the PVDF solution decreased and the evaporation of the solution during electrospinning process was promoted. X-ray diffraction and infrared spectroscopy were used to examine the effect of the volatilization rate of mixed solvent on the nucleation rate of the PVDF crystal phases. With increasing acetone content in the poly(vinylidene fluoride) polymer solution, the rate of a-nucleation decreased with rapid volatilization of the solvent.
Conductive Polypyrrole/Polyester Composite Fabrics for Heating Element
Lee, Eung ; Lee, Jong-Hyeok ; Kim, Young-Ho ; Kim, Eun-Ok ;
Textile Science and Engineering, volume 47, issue 5, 2010, Pages 345~351
A conducting polymer, polypyrrole (PPy) doped with antraquinone sulphonic acid (AQSA), was coated chemically onto polyester (PES) fabrics. PPy was then deposited in sequence on the conducting fabrics (PES covered with PPy/AQSA) by constant-current electrolysis. Electrochemical polymerization (EP) was carried out for different electrolysis times. The weight percent gain, thickness, electrical conductivity and maximum temperature of the PPy-PES increased with the electrolysis time. The structural changes accompanied were examined by SEM and FT-IR. The electrical conductivity ranged from 1.5 to 6.5 S/cm. When a fixed voltage was applied to the PPy-PES, the maximum temperature was increased by more than
. Such conducting PPy-PES fabrics can be used for flexible heating element by 6.0 V DC.
Preparation and Characterization of Poly(phenylene sulfide)/Poly(ethylene terephthalate) Blends
Bae, Ggot-Ha-Yan ; Ham, Myong-Jo ; Kim, Young-Ho ;
Textile Science and Engineering, volume 47, issue 5, 2010, Pages 352~360
A melt blending method was used to blend poly(ethylene terephthalate) (PET) and poly(phenylene sulfide) (PPS) with a twin screw extruder to provide basic data for the production of PPS/PET sheath-core type bicomponent fibers. Differential scanning calorimetry showed that the melting (
) and glass transition temperature (
) of PPS in the PPS/PET blends were unaffected by the addition of PET, even up to 20 wt%. However, PET addition resulted in a decrease in the cold crystallization temperature (
) of PPS and an increase in the melt crystallization temperature (
) of PPS. SEM images of the fracture surface of the PPS/PET blends with various compositions showed that the PET appeared as spherical particles in the blends. This shows that PPS/PET is an immiscible blend system. The addition of up to 20 wt% PET did not affect the mechanical properties of the resulting PPS/PET films. The tensile strength retention of the blend films immersed in an aqueous solution containing either 30% NaOH, 10% HCl or 10%
for one week was unaffected by PET blending.
Hot Drawing Characteristics of Metal Wires without Constraints -Stainless Steel Wires and Copper Wires-
Ha, Bo-Keun ; Kim, Jong-Seong ; Paik, Young-Nam ; Huh, You ;
Textile Science and Engineering, volume 47, issue 5, 2010, Pages 361~370
Micro-sized metal fibers are suitable for multi-functional and high performance industrial components, but the fiber manufacturing process relies heavily on wire drawing with dies, which can cause die-raw material friction. An alternative for the efficient production of the metal fibers is to use dieless wire drawing technology. This paper reports the characteristic differences of the dieless wire drawing process, which relies on forced necking. The hot working principle was applied to the most frequently used raw materials, stainless steel and copper, while a microwave furnace and susceptor were employed. The experimental trials showed that stainless steel wires could be more advantageous in dieless drawing than copper wires in that the necking of the stainless steel wire took place in a narrower zone than copper. Furthermore, a mathematical model was set up considering volume heating and wire cooling and combining the temperature effect of viscosity in Arrhenius form with the plastic deformation in Bingham form. The model showed good agreement with the experiments when the process was carried out in a steady state at various draw ratios and process speeds. These results suggest that the theoretical model can depict the real process quite well.